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  Copyright (c) 2015-2018 Jean-Marc VIGLINO,
  released under CeCILL-B (french BSD like) licence: http://www.cecill.info/
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  <title>ol-ext: Control overlay menu</title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

  <meta name="description" content="styled popup for OL3" />
  <meta name="keywords" content="ol3, manu, control, overlay, jQuery" />

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  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@latest/ol.css" />
  <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/ol@latest/dist/ol.js"></script>
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    <link rel="stylesheet" href="../../dist/ol-ext.css" />
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  <link rel="stylesheet" href="../style.css" />
  <style>
    .ol-overlay.menu {
      width: 30%;
      background: #fff;
      color: #333;
      box-shadow: 0px 0px 5px #000;
      padding: 0.5em;
      -webkit-transition: all 0.25s;
      transition: all 0.25s;
    }
    /* style the close box */
    .ol-overlay.menu .ol-closebox {
      left: 1em;
      top: 0.5em;
    }
    .ol-overlay.menu .ol-closebox:before {
      content:"\f0c9";
      font-family:FontAwesome;
    }
    #menu {
      padding-top: 1.5em;
      font-size: 0.9em;
    }
    /* menu button */
    .ol-control.menu {
      top: 0.5em;
      left: 0.5em;
    }
    .ol-zoom {
      left: auto;
      right: 0.5em;
    }
    .ol-rotate {
      right: 3em;
    }
    .ol-touch .ol-rotate {
      right: 3.5em;
    }
    /**/
    .ol-overlay img {
      max-width: 90%;
    }
    .data,
    .data p {
      margin:0;
      text-align: center;
      font-size:0.9em;
    }
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<body >
  <a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>

  <a href="../../index.html">
    <h1>ol-ext: Control overlay menu</h1>
  </a>

  <div class="info">
    Display an overlay with a content on the map. 
    <ul>
      <li>
        The <i>closeBox</i> option adds a close button to hide the overlay.
      </li>
      <li>
        The <i>closeOnClick</i> option enable close when click on the element.
      </li>
      <li>
        You can listen to the <i>change:visible</i> event to sknow when overlay is displayed/hidden.
      </li>
    </ul>
    <i>ol.control.Overlay</i> requires jQuery. The example uses the <a href="../bar/map.control.toggle.html">ol.control.Toggle</a> 
    to display a toggle control to show the menu.
  </div>

  <!-- DIV pour la carte -->
  <div id="map" style="width:600px; height:400px;"></div>

  <div class="options">
  </div>

  <!-- Content of the menu -->
  <div id="menu">
    <h1>Menu</h1>
    <p style="border-bottom:1px solid #999;">
      <i>ol.control.Overlay</i> can be used to display a menu or information on the top of the map.
    </p>
    <div class="data"></div>
  </div>
  
  <script type="text/javascript">
  // Layers
  var layers = [
    new ol.layer.Geoportail('ORTHOIMAGERY.ORTHOPHOTOS')
  ]

  // The map
  var map = new ol.Map({
    target: 'map',
    view: new ol.View({
      zoom: 5,
      center: [166326, 5992663]
    }),
    layers: layers
  });

  // Overlay
  var menu = new ol.control.Overlay ({ 
    closeBox : true, 
    className: "slide-left menu", 
    content: $("#menu").get(0)
  });
  map.addControl(menu);

  // A toggle control to show/hide the menu
  var t = new ol.control.Toggle({
    html: '<i class="fa fa-bars" ></i>',
    className: "menu",
    title: "Menu",
    onToggle: function() { menu.toggle(); }
  });
  map.addControl(t);

  // GeoJSON layer
  var vectorSource = new ol.source.Vector({
    url: '../data/fond_guerre.geojson',
    projection: 'EPSG:3857',
    format: new ol.format.GeoJSON(),
    attributions: [ "&copy; <a href='https://data.culture.gouv.fr/explore/dataset/fonds-de-la-guerre-14-18-extrait-de-la-base-memoire'>data.culture.gouv.fr</a>" ],
    logo:"https://www.data.gouv.fr/s/avatars/37/e56718abd4465985ddde68b33be1ef.jpg" 
  });

  map.addLayer(new ol.layer.Vector({
    name: 'Fonds de guerre 14-18',
    source: vectorSource
  }));

  // Control Select 
  var select = new ol.interaction.Select({});
  map.addInteraction(select);

  // On selected => show/hide popup
  select.getFeatures().on('add', function(e){
    var feature = e.element;
    var img = $("<img>").attr("src", '//wsrv.nl/?url=' + feature.get("img"));
    var info = $("<div>").append( $("<p>").text(feature.get("text")));
    var content = $("<div>")
        .append( img )
        .append(info);
    $(".data").html(content);
  });
  select.getFeatures().on('remove', function(e){
    $(".data").html("");
  });
  </script>
  
</body>
</html>